def _get_sessions(curs=None):
from_d = datetime.datetime.now(pytz.utc)
logger.info("Sessions dumping into db initiated %s", from_d)
from_d = from_d - datetime.timedelta(minutes=settings.session_valid_minutes)
logger.debug("Fetching not expired sessions, newer %s. Session valid period: %s minutes",
from_d, settings.session_valid_minutes)
f = SessionFilter({'from_update_date': from_d}, {}, ['id'])
return f.filter_objs(curs)
def _clean(curs=None):
to_d = datetime.datetime.now()
logger.info("Sessions cleaning initiated %s", to_d)
to_d = to_d - datetime.timedelta(minutes=settings.session_valid_minutes)
logger.debug("Removing session older %s. Session valid period: %s minutes",
to_d, settings.session_valid_minutes)
f = SessionFilter({'to_update_date': to_d}, {}, ['id'])
sessions = f.filter_objs(curs)
logger.info("Deleting %s sessions", len(sessions))
mapping.delete_objects(curs, sessions)
logger.info("Sessions cleaned")
def dump_into_db(trn_wrapper):
if not settings.session_caching_enabled:
logger.debug("Sessions caching disabled. Nothing to dump")
return
@trn_wrapper()
def _get_sessions(curs=None):
from_d = datetime.datetime.now(pytz.utc)
logger.info("Sessions dumping into db initiated %s", from_d)
from_d = from_d - datetime.timedelta(minutes=settings.session_valid_minutes)
logger.debug("Fetching not expired sessions, newer %s. Session valid period: %s minutes",
from_d, settings.session_valid_minutes)
f = SessionFilter({'from_update_date': from_d}, {}, ['id'])
return f.filter_objs(curs)
@trn_wrapper()
def _dump_session(mem_cache, session, curs=None):
f = SessionFilter({'session_id': session.session_id}, {}, None)
try:
s = f.filter_one_obj(curs, for_update=True)
sess_id = s.session_id.encode('utf8')
cached_s = mem_cache.get(sess_id)
if cached_s is None:
logger.debug("Session %s not found in cache", sess_id)
else:
logger.debug("Cached session %s update date: %s",
cached_s.session_id, cached_s.update_date)
logger.debug("Db session %s update date: %s",
s.session_id, s.update_date)
if cached_s.update_date > s.update_date:
s.update_date = cached_s.update_date
mapping.save(curs, s)
logger.debug("Session %s dumped from cache into db", sess_id)
else:
logger.debug("Session %s update_date in db greater or equal " \
"cached value. Noting to dump", sess_id)
except SessionNotFound, e:
logger.debug("Dumping session failed: %s", e)
def run():
while True:
dump_into_db(transaction)
logger.debug('Sleeping %s minutes', settings.session_dump_to_db_minutes)
sleep(settings.session_dump_to_db_minutes * 60)
def _dump_session(mem_cache, session, curs=None):
f = SessionFilter({'session_id': session.session_id}, {}, None)
try:
s = f.filter_one_obj(curs, for_update=True)
sess_id = s.session_id.encode('utf8')
cached_s = mem_cache.get(sess_id)
if cached_s is None:
logger.debug("Session %s not found in cache", sess_id)
else:
logger.debug("Cached session %s update date: %s",
cached_s.session_id, cached_s.update_date)
logger.debug("Db session %s update date: %s",
s.session_id, s.update_date)
if cached_s.update_date > s.update_date:
s.update_date = cached_s.update_date
mapping.save(curs, s)
logger.debug("Session %s dumped from cache into db", sess_id)
else:
logger.debug("Session %s update_date in db greater or equal " \
"cached value. Noting to dump", sess_id)
except SessionNotFound, e:
logger.debug("Dumping session failed: %s", e)
def run():
while True:
clean(transaction)
logger.debug('Sleeping %s minutes', settings.session_cleaning_minutes)
sleep(settings.session_cleaning_minutes * 60)
